CVE-2026-1503 login_register <= 1.2.0 - Cross-Site Request Forgery to Stored Cross-Site Scripting
Unauthenticated attackers can inject scripts via CSRF, leading to code execution or account takeover if an administrator clicks a malicious link.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-1503?
CVE-2026-1503 is a medium-severity vulnerability in frankkoenen Plugin Name: login_register, published on 21 Mar 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
The login_register plugin for WordPress is vulnerable to Cross-Site Request Forgery to Stored Cross-Site Scripting in all versions up to, and including, 1.2.0. This is due to missing nonce validation on the settings page and insufficient input sanitization and output escaping on the 'login_register_login_post' parameter. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page via a forged request granted they can trick an administrator into performing an action such as clicking on a link.
Weakness: CWE-352
Which versions are affected by CVE-2026-1503?
How do I fix CVE-2026-1503?
No fix has been published for CVE-2026-1503 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-1503 being exploited?
There is no known exploitation of CVE-2026-1503 in the wild and no public exploit code.
Sources
Also known as GHSA-p352-rg87-vcp2.